Be carefull: This is a HV (high voltage) Lipo, do not try to overcharge your normal Lipos with more than 4.2V/cell!
This is the latest generation of Gens Acs Tattu R-Line, now in version 2 and HV (high voltage). The single cells are rated with 4.35V instead of 4.20V, and charging them to 4.35V gives the Lipo a advantage of more than 200mAh against charging it with 4.20V.
This battery is the smaller brother of the R-Line V2 1550mAh version, and right now, this Lipo is outperforming every Lipo tested at Lipobench so far in the rated 1300mAh class. But of course, like on the 1550mAh version that is a 1800mAh if charged to HV, the 1300mAh R-Line V2 is indeed a 1500mAh if charged to 4.35V/cell. So you better should compare this battery to others of the 1500mAh class.
The discharge curves on the graphs do indeed show the great performance of this Lipo, and while the results are great at 30A and 60A, Gens Ace did manage to build a excellent performing Lipo even at 80A. Somehow they did even manage to keep the temperature under control, like on the 1550mAh version. You really should compare the dynamic race test results (and the IR) of this 1300mAh R-Line V2 with the 1550mAh R-Line V1.
The 163g weight is really light compared to others of this performance and mAh class in the ranking, so this battery does indeed perform great. But please be aware that the HV batterys will lose more performance in the same period of time than a "normal" battery with 4.2V/cell, so this performance boost does come with a price to pay. (There are currently tests running how big the difference in performance loss realy is.)
If you are looking for the best performance at the given weight, you will have to pay a price. Not only in money, also in a (slightly?) faster performance drop than a regular battery.